Julia Kostera Biography: Age, Net Worth, Height, Sister, Boyfriend, YouTube

Julia Kostera is a Polish influencer and content creator who first gained wide attention in 2019 as a member of Team X, a YouTube collaborative project led by popular creator Stuart Burton.

Born and raised in Wrocław, she launched her own YouTube channel in 2015, producing fashion, beauty, and lifestyle videos that resonated with a growing audience of teenagers and young adults.

Profile

• Full name: Julia Kostera
• Date of birth: August 5, 2003
• Age: 22 years old
• Gender: Female
• Place of birth: Wrocław, Poland
• State of origin: Lower Silesian Voivodeship, Poland
• Nationality: Polish
• Profession: Influencer, YouTuber, Vlogger, Entrepreneur
• Height: N/A
• Parents: N/A
• Siblings: Iga Kostera
• Spouse: None
• Children: None
• Relationship status: In a relationship with Filip Tarasiuk
• Ethnicity: Polish
• Net worth: $1 million

Early Life and Education

Julia Kostera was born on August 5, 2003, in Wrocław, a major city in southwestern Poland. Raised in a Polish-speaking household, she has a sister named Iga. By the age of nine, she was already experimenting with home-recorded videos, though those initial recordings were never released publicly.

Her formal education details remain undisclosed, as she opted for a combination of traditional schooling and home-based learning to balance the demands of her burgeoning online career. She sat for her Polish matura exams in 2021, indicative of completing secondary education.

Personal Life

In 2019, Julia began dating fellow YouTuber Kacper Błoński during their time in Team X; their partnership was frequently highlighted by fans but ended after more than two years.  

Following that breakup, she entered a relationship with Filip Tarasiuk in 2022. Kostera has been candid about her challenges with stress and depression, notably stepping back from social media in mid-2024 to focus on her mental health.  

Career

Julia Kostera launched her YouTube channel in 2015 at the age of twelve, creating videos modelled after her favourite creators—ranging from unboxing and hauling content to tutorials on how to gain traction on emerging platforms like TikTok.

Her breakthrough came in 2019 when she joined Team X, collaborating with other prominent Polish YouTubers and gaining recognition as a fresh face in the digital community.  

After Team X disbanded, Kostera continued to grow her brand, focusing on fashion, beauty, and lifestyle content that resonated particularly with teenage audiences.  

By early 2024, her YouTube channel had amassed approximately 895,000 subscribers, with videos garnering over 147 million total views. Concurrently, her Instagram account exceeded one million followers, where she regularly posts style lookbooks, beauty tutorials, and personal updates.

In mid-2023, Kostera ventured into entrepreneurship by launching a lingerie collection in collaboration with Promees, featuring twelve distinct pieces named after cities that hold personal significance to her. She has also appeared in music videos, most notably making a cameo in the “Crusher” video by Kacper Błoński in late 2020.  

Net Worth

Julia Kostera’s net worth is estimated to be $1 million. This wealth has been accumulated through her successful career as a social media influencer, YouTuber, and entrepreneur.

Social Media

• Instagram: @juliakostera
• YouTube: Julia Kostera
• TikTok: @juliakostera
• X: @juliakostera